Improvement in saw-filing machines



2 Sheets-Sheet I.

L Saw-Fi ling Machines.

CLEVELAND.

Patented Jan. 5,1875.-

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2 Sheetssheen,

1,. CLEVELAND. Saw-Fiiing Machines.-

Patented Jam. 5, 1875.

UNITED STATES PATENT OFFICE,

JEROME CLEVELAND, OF TECUMSEH, MICHIGAN, ASSIGNOR TO HIMSELF AND HENRYHAINES, OF SAME PLACE.

IMPROVEMENT lN SAW-FILING MACHINES.

Specification forming part of Letters Patent No. 158,470, dated January5, 1875; application filed December 10, 1873, 0

To all whom it may concern:

Be it known that I, JEROME CLEVELAND, of Tecumseh, in the county ofLenawee and State of Michigan, have invented an Improvement inSaw-Filing Machines, of which the following is a specification:

The nature of my invention consists'in the construction and arrangementof a machine for filing saws, whereby saws with any-sized teeth may befiled with any desired amount of rake and with or without flem, as willbe hereinafter more fully set forth.

Figure l is'a perspective view of my improved saw-filing machine. Fig. 2is a crosssection through the bed-plate and ways at m w in Fig.1. Fig. 3is a cross-section of the fileclamp at y y in. Fig. 1. Fig. 4 is anelevation of the opposite of the division-plate from that seen in Fig.1.

In the drawing, A represents a rectangular iron frame, supported onshort legs, and in the sides of whose longer bars are formed the ways a,in which reciprocates a bed-plate, B, carryin g a stationary nut, 0,through which is tapped a lead-screw, 1), having a pitch of one threadto the inch, one end of which is stepped in a lug, I), at the right-handend of the frame, while the other is journaled through a similar lug atthe left-hand end of the frame, and to its projecting end is secured ahand wheel or disk, E, having its inner face divided off into concentriccircles, twelve in number, the inner one having a single point, thesecond two points dividing the circumference into two equal parts, thethird into three equidistant spaces, and so on until the last circle,which is pointed or spotted into twelve equal divisions. A completerevolution of the screw in the nut will move the bed-plate a distance ofone inch in the ways. A half-revolution will move it a half-inch, and atwelfth of a revolution will move said bedplate one-twelfth of an inch,and so on for intermediate distances. To guide the filer, an index, F,is pivoted to a post, Gr, at the corner of the frame and secured by aset-screw, its free end lying on the face of the division-plate, whereits end serves as apointer to guide the filer in moving the hand-wheel,and through it the bed-plate. Back of the middle of the frame, andconnected therewith by aT-shapcd girt and a brace, is a clamp-standard,H, with a T-head, which forms the stationary jaw for the movablesaw-clamp H, which is pivoted near its middle to a projecting lug, c,and is actuated by a temper-screw, d, at its lower end in clamping asaw-blade. I is a segmental slot cut in the bed-plate in the radius ofthe center of the clamp, and in it is secured a curved movable post, J,by means of a setscrew, J ,tapped into its lower end, and which clampsit firmly toth'e bed-plate at any point in the slot. K is a frame boltedto the top of the post J, with a shaft, L, transversely journaled at themiddle upper part, havingalarge spur-wheel, M, secured to its projectingend, with a crank, M, by which it is rotated. There is also a pinion, N,on the shaft L,which meshes with and gives a slower motion to a gear, Nmounted on a transverse shaft, N transversely journaled in the back partof the frame K, projecting through the left side, where it has keyed onit a cam, 12. The large spur-wheelM meshes with a pinion, O, mounted ona shaft, 0, transversely journaled in the near part of the frame, itsprojecting left end carrying a crank-wheel or face-plate, I, whichreciprocates a cross head, f, between the slides g, bolted to the sideof the frame K, through a connecting-rod, Q. To the cross-head ispivoted one end of a bar, R, moving over the cam c and through ayoke-guide, h, which allows it to play above a horizontal line in thevertical plane. S is a clamp, provided with a screw, i, slipped over thefree end of the bar It, with a circular file-socket, 7c, inserted in itslower end. The lower face of the bar E is fluted to receive the upperpart of the socket, which, when the clamp is drawn up by turning downthe screw i, is forcibly compressed against said bar, which socket isthereby held immovably in place. The socket has a triangular opening toreceive the point of a file, T, whose tang is received in an openingformed in the pendent end of a screw-clamp, S, which slides on the barB. As the socket 70 may be axially rotated friction-roller, l, journaledat its free end,which presses upon the said bar, the pressure beingregulated by a screw, V, tapped through a lug projecting from the frame,its lower end bearin g upon the lower leg of said spring, by means ofwhich the pressure of the file upon the sawteeth is readily adjusted.

The operation of the machine is as follows: The file is inserted in theclamps S and S, and is turned to any desired angle, according to therake of the teeth desired, by rotating the socket 7c, and the file isfirmly held in such position by screwing up the set-screw i, whichforces the socket 70 against the lower corrugated surface of the bar It.The standard J, which carries the filing mechanism, is then adjusted inthe segmental 'slot I in the plate B, according to the flem or angle offace desired. The index F is then turned to bring its pointed endopposite the desired circle on the inner face of the disk E, accordingto the size of the teeth of the saw to be filed. The ma chine is nowready for operation, and the saw is fastened in the clamp H H. By nowturnin g the crank M the file is moved rapidly back and forth and heldby the action of the spring U against the saw-tooth. During eachrevolution of the slow wheel N the cam 0 will once raise the bar Rsufliciently to liftthe file up from between the saw-teeth, and whilethe file is so raised the operator shifts the bed-plate B, with theentire filing mechanism, to the next tooth, and as the cam e continuesto re- "olve the bar R is forced down by the spring U to let the fileoperate on the next tooth.

The shifting of the filing mechanism is accomplished simply by turningthe disk E until the index points at-the next division on the circle,where it is set. This revolution, or partial revolution, of the diskturns the screw D in the nut O, and moving said nut, with the bedplateand mechanism, the exact distance required.

It will thus be seen that when the machine is set properly all theoperator has to do is to set the shifting device, when the barR israised by the cam e, and that any sizes of saw-teeth may be filed withany desired amount of rake, and with or without flem.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination of the sliding bed-plate B, provided with thesegmental slot I and nut O, the adjustable standard J carrying thefiling mechanism, the screw D, the disk E, provided on its face with aseries of concentric circles divided as described, and the adjustableindex F, all constructed and arranged to operate substantially as andfor the purposes herein set forth.

2. In combination with the reciprocating filing-bar It, thepressure-sprin g U with roller-Z, for the purposes herein set forth.

3. The combination, with the reciprocating filing-bar R, of thepressure-sprin g U, roller 1, and adjusting-screw V, substantially asand for the purposes herein set forth.

JEROME GLEVE LAND.

Witnesses:

H. F. EBERTS, U. E. Hunsrrs.

